Switch-lever lock



No. 608,833. Patented Aug.'9, I898;

R. S. BUSH. SWITCH LEVER LOCK.

A lication filed Feb. 4; 1898.)

(No Model.)

WITNESSES ATTOR/VEVJ NllTlEU Frames;

a'rnnr trims.

ROBERT S. BUSH, OF GREENSBURG, PENNSYLVANIA.

SWITCH-LEVER LOCK.

SPECIFICATION forming part of Letters Patent No. 608,833, dated August 9, 1898. Application filed February 4, 1898. Serial No. 669,072. (No model.)

To all whom it mayconccrrb:

Be it known that I, ROBERT S. BUSH, a citizen of the United States of America, residing at Greensburg, in the county of lVestmoreland and State of Pennsylvania, have invented certain new and useful Improvements in Switch-Lever Locks, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and 7 adapted to be compressed within the casing by the action of a lever engaging the same and which when the lever passes beyond the lower end of thesame extends outwardly over the lever, requiring the releasing of the locking-bar and the withdrawal of the lockingplate within its casing, the latter being accomplished by means of the foot lever or treadle.

In describing the invention in detail reference is had to the accompanying drawings, forming a part of this spcificatiomand wherein like letters of reference indicate similar parts throughout the several views,in which Figure 1 is a perspective view of a portion of the switch, showing my improved keeper in position. Fig. Zisaside view of the keeper. Fig. 3 is a longitudinal sectional view. Fig. 4H8 a like view with the locking-plate removed. Fig. 5 is a rear view. Fig. 6 is a perspective view showing the front of the keeper. Fig. 7 is a like View showing the rear of the keeper with the plate removed. Fig. 8 is a perspective view of the locking-plate and levers for operating the same. Fig. 9 is a rear view of a slightly-modified form of keeper. Fig. 10 is a perspective view of the locking-bolt.

Referring to the drawings by reference-letters, a indicates the bed-plate, which is firmly spiked or otherwise secured to the switclntic b and which is provided at its one end with an upwardly-extending lug c, which acts as a stop for the locking-plate d. This latter is pivotally hung upon a rod 6, extending through the block f, the latter being provided with a recess f, within which the locking-plate is adapted to be depressed by the action of the switch-lever. This locking-plate cl is pivotally secured within the recess by means of the rod or pin 6, extending through the block and through the upper left-hand corner of the locking-plate, thereby causing the one edge and lower portion of the plate to protrude through the recess and come into engagement with the step c. The lower edge of the lock ing-plate is cut on an incline, so that when the plate is in its normal or locking position the said lower edge will be on a horizontal line. This locking-plate is also provided with a cut-away portion d, which extends for some distance into the plate and within which is pivotally secured the rod (1 likewise pivotally connected at its lower end to the foot or treadle lever (1 which has a bifurcated end to receive the end of the rod d This foot or treadle lever 01 is pivotally supported at its center, and by reason of the weight of the rod d and a pull exerted 011 the same by the locking-plate d the outer end of the foot or treadlc lever is held normally elevated and is held depressible within a slot provided thereforin the plate a and in the plate a, which is formed integral with the block f and forms a means for securing the block to the plate a. A face-plate c is so cured to the rear of the block and prevents tampering with the locking-plate, said faceplate being provided with a keyhole, which registers with the aperture a provided in the block f. Arranged within this block f is a sliding belt or bar 9, which is provided with a slot or groove 9, that is adapted to be engaged by the key inserted through the key hole, and by means of the key this locking bolt or. bar may be thrust outwardly over the top of the locking-plate, and thereby prevent the moving of the same, or, when the bolt is withdrawn, the plate will be easily depressible within its block by the pressure of the foot upon the treadle lever (2 In Fig. 9 of the drawings I have shown a lever h, pivotally hung within the block and having an upwardly-projecting end 7L2, which ICO engages the groove or slot in the locking-bar eration of the plate and holds the same out of engagement with the said locking-bar. WVhen, however, this lever is operated, so as to release it from engagement with the bar, a coil-spring 7L3, arranged within the recess which contains the locking bar or bolt, forces the latter outwardly over the locking-plate and prevents the operation of the same.

It will be observed that when this locking bar or bolt hasbeen withdrawn the lockingplate (I may be readily depressed within the recess in the block by a pressure on the foot or treadle lever (1 and the switch-lever can then be turned from the position in which it has been locked to the opposite, the lockingplated on the opposite keeper being depressed by the action of the lever as it comes into contact with the same until the lever passes out of engagement with the said plate, which as suming its normal position locks the same within the keeper.

While the foregoing appears to embody the preferred form of my invention, yet I do not wish to limit myself to the exact construction as herein shown and described, as various changes may be made in the details of construction without departing from the general spirit of my invention.

Having fully described my'invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a switch-keeper the combination with the bed-plate which is provided with an up-' wardly-extendin g lug forming a stop, a block upon said plate, said block being provided with a recess within which is pivotally hung a locking-plate which normally protrudes through the recess of the block and engages the stop of the plate, a foot or treadle lever pivotally hung within the block and connected by a pivoted lever to the locking-plate for operating the same, a locking bolt or bar arranged within the block and means for operating the same to engage with or disengage from the locking-plate, substantially as shown and described.

In testimony whereof I aflix my signature in the presence of two witnesses.

ROBERT S. BUSH.

Witnesses:

JOHN P. EIOIIER, J. G. S'IURRY. 

